1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a3880c2f494a4cee7b4040568af15f7a98ecfab197767df59059c5ae401f17. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30bc9bb9-9f87-4d7b-9de7-684ac8e61ac1.json and https://artists.proofprofile.net/proofs/artist/30bc9bb9-9f87-4d7b-9de7-684ac8e61ac1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff76ed793f9ad6e290ed4b69525688dda9408bc39604c844d00d9d6699b64f7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2502581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac267085005106b87d68a5f8ccf57c1141370763b6f0618aa68807eec9f8911. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2502582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73467dd3b3f534fbf3c303ac6473eff56b4a8fdec7dd60a1aacafd46734ac2e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2502583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a78a6dfbc7bc7f1147a21b62bc63b3f2e4060c3c2141ca6dfd09d65691ab8c3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2502584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01544ce5e2a1bd1acbb7231b5bf7ad6ae05082991ec010535cc58dd1d271e0d3. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2502585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18a53dbc7eea7c6aa8286df242652ce539545ea6aae6f6048aa4bea0fce7c8c. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2502586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c16677565dece6d58a5b1e24ce4a2f90c54fdbc674bcefdac90fd48dce11556. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2502587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa687b666c4ec2ae580bf3eebb6a86c13e4383361fc95ffc653d9014799409809. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2502589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237d1692439571c3e68457d42d427d9e9824f487b08b36c6e69cdc8c51c998f9. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:57:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2502591.